Variable-speed and reversing mechanism for lathes, planers, &amp;c.



Patented Apr. 9, IBM.

R; B. 'MARSHKE. VARIABLE SPEED AND BEVEBSING MECHANISM FOR-LATHES,PLANEBS, 8L6.

A lmgion filed Nov. 1, 1900. (No llodai.)

'NITED STATES PATENT OFFICE.

REINHOLD B. MARSHKE, OF CHAFFEE, NORTH DAKOTA.

VARIABLE-SPEED AND REVERSING MECHANISM FOR LATHES, PLANERS, dc.

SPECIFICATION formingpart Of Letters Patent No. 671,487, dated April 9,1901. Application filed November 1, 1900. Serial No. 35,077. (No model.)

To tbZZ whom it may concern:

Be it known that I, REINHOLD B. MARSHKE, a citizen of the United States,residing at Ohaffee, in the county of Cass and State of North Dakota,have invented new and useful Improvements in Variable-S peed andReversing Mechanism for Lathes, Planers, &c., of which the following isa specification.

The object of my invention is to provide a simple and efficient devicefor reversing the rotary movement of a driving-shaft and driving thesame in opposite directions at different rates of speed.

The construction of my device isexplained by reference to theaccompanying drawings, in which-- Figure 1 represents a front view. Fig.2 represents a side view drawn at right angles to that shown in Fig. 1.Fig. 3 is a detail, part in section, showing means for holding one ofthe pulleys in place on the drivingshaft. 7

Like parts are identified by the same reference-letter's in all theviews.

A is the main driving-shaft.

B is the pulley running loose on the shaft A and driven by the belt 0 inthe direction indicated by the arrow and adapted to be moved toward theright and left on said shaft by the shifting lever D, which lever D isconnected with said pulley B by the bifurcated arm E in the ordinarymanner, the forks of which arm have loosely-fitting bearin gs in therecess F, formed in the hub of said pulley B. The opposite end of saidarm E is connected with the lever D by a pivot Gin the ordinary manner.

The pulley B is provided with a clutch H upon the right and a clutch Iupon the left. The clutch H is adapted when said pulley is shiftedtoward the right to engage in the clutch J, which clutch J is rigidlysecured to the shaft A, while the clutch I is adapted when said pulleyis shifted toward the left to engage with the clutch K, which is rigidlyconnected with the pulley L. When the pulley B is in the position shown,(midway between the two clutches J and K,) it is free to rotate withoutdriving the shaft A. When said pulley is shifted toward the right, theclutch H engages the clutch J, whereby the shaft A is driven, with saidpulley B, in the same direction. When, however, the pulley is shiftedtoward the left, so that the clutch I engages the clutch K, motion iscommunicated throughsaid clutches to the pulley L, whereby said pulleysB and L are driven together in the same direction, as indicated by thearrow, and whereby motion of the pulley L is communicated to the shaft Athrough the belt M and pulley N, thereby causingthe shaft A to be drivenin the opposite direction from the driving-pulley B. The fixed collar L'on the shaft A prevents the lateral movement of the pulley L.

It will be understood that the pulley N is rigidly keyed to the shaft A,while the pulley L, as well as the pulley B, is loose on said shaft. Inthus communicating motion to the pulley N and shaft A the belt M passesupwardly (as indicated by the arrow) and over the idler 0, down aroundthe pulley N, passing from thence upwardly and over the rear idler P.Swivels R are provided in the supports S of the idlers O and P to permitsuch idlers to turn at an angle to the shaft A when the pulleys L and Nare of difiereut diameters. I have shown the pulley N smaller than thepulley L, whereby when motion is communicated to the shaft A through thepulley N said shaft A is caused to rotate in the reverse direction at ahigher rate of speed than the driving-pulley in proportion to therespective sizes of the pulleys L and N. When, however, it is desirousto change the relative speed of the shaft to that of the driving-pulley,such end is accomplished by changing the relative sizes of the pulleys Land N to each other, whereby it is obvious that any desired speed ofsaid driving-shaft may be procured in either direction from a uniformgiven speed of the pulley by changing the relative size of the pulleys Land N to each other.

While I have for convenience shown the idlers O and P supported inconnection with the driving-shaft A, it is obvious that, if desired,said idlers may be supported independently. of said shaft from theceiling or otherwise.

While my device is not shown in connection with any special machinery,it is obvious that it is adapted to be used in connection with lathes,planers, and other machinery where it is desirous to reverse themovement and change the speed of such machinery.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a variable-speed and reversing inechanism for lathes, planers,&c., the combination of a driving-shaft; a loose driving-pulley slidablysupported upon saidshaft, provided" upon its respective sides withclutches; means for shifting said drivi n g-pulley longitudinally I onsaid shaft; a clutch rigidly affixed to said driving-shaft upon one sideof said drivingpulley, and adapted to be engaged by the opposing clutchon said pulley; a second pulley loosely supported from said shaft uponthe;

opposite side of said driving-pulley, provided with a clutch adapted tobe engaged by the opposing clutch of said driving pulley; a thirdpulley, rigidly aflixed to said shaft; two independently-revolublepulleys or idlers located at an intermediate point at one side of' saiddriving-shaft; and a belt communicating from said second pulley over oneof said idlers to said third pulley, and from thencef tudinally on saidshaft; a clutch rigidly affixed to said driving-shaft upon one side ofsaid driving-pulley, and adapted to be engaged by the opposing clutch onsaid pulley; a second pulley loosely supported from said shaft upon theopposite side of said drivingpulley, provided witha clutch adapted to beengaged by the opposing clutch of said driv-, ing-pulley; a third pulleyof different diameter from said second pulley, rigidly affixed to saidshaft; two independently-revoluble pulleys or idlers located at anintermediate point at one side of said driving-shaft; and

* a belt communicating from said second pulley over one of said idlersto said third pulley, and from thence over the other of said idlers tosaid second pulley, whereby when said second pulley is revolved by theaction of said driving-pulley, said third pulley is revolved in theopposite direction, together with its supporting-shaft, at a differentrate of speed, substantially as and for the purpose specified.

3. In a variable-speed and reversing mechanism for lathes, planers, &c.,the combination of a driving-shaft A; a loose drivingpulley B slidablysupported upon said shaft, provided upon its respective sides withclutches H and I; means for shifting said driving-pulley longitudinallyon said shaft, consisting of thelever D and bifurcated arm E adapted toengage in the groove F of the pulley-hub B; a clutch I rigidly affixedto said driving-shaft upon one side of said driving-pulley and adaptedto be engaged by the opposing clutch H of said pulley; a second pulley Lloosely supported from said shaft upon the opposite side of saiddriving-pulley, provided with a clutch K, adapted to be engaged by theopposing clutch I of said driving-pulley; a third pulley N, of adifferent diameter, from said second pulley L, rigidly affixed to saidshaft; two independently-revoluble pulleys or idlers O and P supportedfrom said shaft A, located at an intermediate point at one side of saiddriving-shaft; and a belt M communicating from said second pulley L overone of said idlers O to said *third pulley N, and from thence back overthe other of said idlers P to said second pulley L, whereby when saidsecond pulley is revolved by the action of said driving-pulley, saidthird pulley is revolved in the opposite direction together with itssupporting-shaft, substantially as and for the purpose specified. Intestimony whereof I affix my signature in the presence of two.witnesses.

REINI-IOLD B. MARSHKE. Witnesses:

0. Fl VAIL, J. B. VAIL.

